Simoco EMEA Ltd SDB670AC01 Manual De Usuario
SDB670 – SERVICE MANUAL
TNM-M-E-0032
May 13
Page 25
DESCRIPTION
Figure 5. Layout of Rear Panel (AC version).
Figure 6. Layout of Rear Panel (DC version).
Table 8. Rear Panel Connections.
Connector # Conn Type
Function
Description
Power I/P
13.8 V DC power input
S2
RS232
Serial Port
S1
D Type
Facilities
P5
RJ45
Ethernet
10/100 base-T RJ45 Ethernet connector
P4
USB Type B
Peripheral
USB peripheral interface
P3
USB Type A
Host
USB interface
Battery Backup
Tx
N Type
Tx O/P
RF Power output from the Tx
Rx 1
BNC
Rx I/P
Rx input for full duplex operation
4.3.1
Tx/Rx Connections
The Tx antenna connection on the DMR Base is provided with 50 Ω female N-type socket, while
for the Rx antenna connection a BNC socket is used.
for the Rx antenna connection a BNC socket is used.
The Tx antenna cable connection must be made with 50 Ω N-type on a flexible tail. The Voltage
Standing Wave Ratio (VSWR) of Tx and Rx connections should be tested prior to use by using of a
suitable test set, e.g. an Anritsu/Wiltron S331A. A good VSWR of 1.5:1 or better at the relevant Tx
and Rx frequencies should be ensured.
Standing Wave Ratio (VSWR) of Tx and Rx connections should be tested prior to use by using of a
suitable test set, e.g. an Anritsu/Wiltron S331A. A good VSWR of 1.5:1 or better at the relevant Tx
and Rx frequencies should be ensured.
Mating connectors should be galvanically compatible with nickel outer and gold centre pin to
minimise passive intermodulation.
minimise passive intermodulation.
A minimum of 85 dB transmit-receive isolation should be provided by the antenna system and
associated filters.
associated filters.
It is recommended that a good quality flexible co-axial cable is used, e.g. with double-screening
braid and multi-strand copper inner.
braid and multi-strand copper inner.